CN115581846B - Anti-drop guide pipe device - Google Patents

Abstract

The invention discloses an anti-drop guide catheter device, which comprises a sheath catheter and a catheter penetrating through the sheath catheter, wherein a limiting groove is formed in the inner wall of the sheath catheter, a limiting ring is rotationally connected in the limiting groove, a limiting wire is arranged on the limiting ring, one end of the limiting wire is fixedly connected to the groove wall of the limiting groove, the circumferential length of the limiting wire covering the limiting ring after being unfolded ranges from one half circumference to two thirds circumference, and the limiting ring is elastically sleeved on the catheter. According to the guide catheter device provided by the invention, a doctor rotates a catheter with a left hand, the limiting ring is sleeved on the catheter, namely the catheter can drive the limiting ring to rotate when rotating, the circumferential length of the limiting wire on the limiting ring can be increased to two thirds of circumference, the rotating angles of the catheter which are not the same in forward rotation and reverse rotation at each time can be accumulated, when the accumulated rotating angle reaches 240 degrees, the catheter is limited by the limiting wire, and the doctor can reverse the catheter by a larger angle at the time, so that the catheter is prevented from being damaged due to overlarge rotating amplitude.

Description

Anti-drop guide pipe device

Technical Field

The invention relates to the technical field of medical equipment, in particular to an anti-falling guide catheter device.

Background

Coronary artery disease is one of the diseases with the highest mortality rate, and the coronary artery angiography technology realizes real-time imaging of coronary artery in operation through X-rays, has the advantages of wide adaptation diseases, high diagnosis efficiency and the like, and is the 'gold standard' for coronary heart disease diagnosis at present. During the operation of coronary angiography, the basic operation is that when the catheter enters the human body, the catheter needs to be rotated by the right hand, the catheter needs to be fed by the left hand, the catheter needs to be rotated by the left hand when the catheter is fed in, when the catheter is withdrawn from the human body, the catheter needs to be rotated by the right hand, the catheter needs to be withdrawn by the left hand, and the catheter is rotated by the left hand when the catheter is withdrawn by the left hand, so that the catheter is prevented from being rotated in the same direction all the time. Some operators think that the temperature cannot exceed 270 ℃, otherwise the catheter is easy to be broken and knotted to damage the blood vessel; theoretically, any rotation and advance and retreat of the catheter should be performed under invasive pressure detection; more smoking (contrast agent release), less acquisition; invasive pressure curve changes should be noted throughout the process.

The coronary artery conveying catheter comprises a hollow tube and a metal rod, and is named as coronary artery conveying catheter, catheter and device for cardiac intervention treatment, wherein the publication number is CN201520230005.3, the publication date is 11/09/2018; the hollow tube comprises a tube body section and an oblique opening section, and is used for being placed into a coronary artery balloon dilatation catheter or a stent delivery system; the length of the hollow tube section is 220-380mm, the length of the oblique opening section is 2-6mm, the outer diameter range of the hollow tube is 1.60-1.80mm, the inner diameter range of the hollow tube is 1.00-1.64mm, and the effective length of the coronary artery delivery catheter is 135-165cm; the hardness of the tube section gradually decreases from the rear end to the front end; the rear end of the bevel opening section is provided with a bevel opening, an included angle formed by the bevel opening and the axial direction of the hollow pipe is alpha, wherein alpha is more than or equal to 20 degrees and less than or equal to 90 degrees; the back end of the bevel section is welded and fixed with the front end of the metal rod, the hollow tube and the metal rod form a fixed whole, the outer diameter of the coronary artery conveying catheter of the utility model is smaller than the outer diameter of the guide catheter, the small outer diameter naturally has better trafficability in blood vessels, thus the operation is easier, and the far end of the coronary artery is easier to be delivered during the operation; the middle layer of the coronary artery conveying catheter is made of medical metal materials and is integrated, so that the firmness, the pushing property, the force conductivity and the coaxiality of the product are improved; in addition, the front end of the coronary artery conveying catheter of the utility model can realize different sections with different hardness, especially has a far end with lower hardness, and can conveniently enter a tortuous complex blood vessel while ensuring the conduction and the coaxiality of pushing force and force.

In the prior art, when a catheter is in and out during operation, the catheter needs to be rotated in one direction for a period of time and then needs to be rotated in the other direction, most doctors think that the angle cannot exceed 270 degrees based on the summary of experience, otherwise the catheter is easy to be broken and knotted to damage blood vessels, theoretically, doctors repeatedly rotate and advance and retreat the catheter, and the rotation of the catheter cannot exceed 270 degrees at one time to further cause the injury of the catheter, but in the practical operation, due to personal habits, the amplitude of the forward rotation and the reverse rotation of the catheter are probably inconsistent, so that the catheter has a certain accumulated rotation amplitude after each rotation, for example, the reverse rotation is only 50 degrees after each forward rotation is 60 degrees, so that the accumulated rotation amplitude of the tail section of the operation exceeds 270 degrees to cause the injury of the catheter, the prior art can only correct the point through the repeated training of the doctors, and has no structural prevention technology.

Disclosure of Invention

The invention aims to provide an anti-falling guide catheter device to solve the defects in the prior art.

In order to achieve the above purpose, the invention provides the following technical scheme:

the utility model provides an anti-drop guide pipe device, includes the sheath pipe and wears to locate catheter in the sheath pipe, be provided with the spacing groove on the sheath pipe inner wall, spacing inslot rotation is connected with the spacing ring, be provided with spacing silk on the spacing ring, spacing silk one end rigid coupling in on the cell wall of spacing groove, cover after the spacing silk expandes the circumference length of spacing ring is between half circumference to two-thirds circumference, spacing ring elasticity cup joint in on the catheter.

In the anti-falling guide catheter device, the limiting ring rotates to drive the limiting wire to be in a contracted state and a tightened state.

In the anti-falling guide catheter device, the distal end of the catheter is provided with the bending part, and the bending part is provided with the plurality of round holes.

Foretell anti-drop guide pipe device, the spacing ring includes inner ring and outer loop, outer loop elasticity cup joint in on the inner ring, inner ring elasticity cup joint in the near-end of pipe, the inner ring stretches out the sheath pipe is outside, circumference is provided with a plurality of protruding ribs on the outer loop, be provided with a plurality of ring channels on the protruding rib, be provided with the bellying on the inner ring, the bellying with the ring channel one-to-one.

In the anti-falling guide catheter device, the proximal end of the inner ring rotates to drive the catheter to rotate.

In the anti-falling guide pipe device, the rotation of the guide pipe drives the protrusions on the inner ring to rotate, and the protrusions pass through the annular grooves one by one.

In the anti-falling guide catheter device, the proximal end of the inner ring rotates to drive the catheter to rotate, and the rotation of the catheter drives the inner ring to rotate in two opposite directions.

In the above technical solution, according to the anti-drop guide catheter device provided by the invention, when the catheter advances and retreats into and out of the sheath, and the catheter is rotated by the left hand of a doctor, the limiting ring is elastically sleeved on the catheter, so that the catheter does not receive resistance when rotating or advancing and retreating, but the catheter can drive the limiting ring to rotate when rotating, at this time, the circumferential length of the limiting wire on the limiting ring can be gradually increased to two thirds of circumference, the rotation angles of the catheter, which are not the same in each forward rotation and reverse rotation, can be accumulated, when the accumulated rotation angle reaches 240 degrees, the catheter can be limited by the limiting wire, the doctor can rotate the catheter with larger resistance or even still, at this time, the doctor can rotate the catheter in a larger angle in the reverse direction, and the catheter damage caused by the overlarge rotation amplitude can be prevented.

Drawings

In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.

Fig. 1 is a schematic structural view of an anti-drop guiding catheter device according to an embodiment of the present invention;

fig. 2 is an internal cross-sectional view of a sheath of the anti-detachment guiding catheter device according to the embodiment of the present invention;

fig. 3 is a schematic view of a catheter tail end structure of the anti-falling off guide catheter device according to the embodiment of the invention;

fig. 4 is a schematic structural view of an anti-detachment guiding catheter device according to another embodiment of the present invention;

FIG. 5 is a top view of an inner ring and an outer ring of a dropout prevention guide catheter device according to still another embodiment of the present invention;

FIG. 6 is a schematic view of the engagement of an annular groove and a boss provided in accordance with yet another embodiment of the present invention.

Description of the reference numerals:

1. a sheath tube; 2. a conduit; 3. a limiting groove; 4. a limiting ring; 5. a limiting wire; 6. an inner ring; 7. an outer ring; 8. a raised rib; 9. an annular groove; 10. a boss portion; 11. a bending section;

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings.

In various embodiments of the present invention, "proximal" and "distal" are relative orientations, relative positions, and orientations of elements or actions with respect to one another from the perspective of a clinician using the medical device, and although "proximal" and "distal" are not intended to be limiting in scope, proximal "generally refers to the end of the medical device that is closer to the clinician during normal operation, and distal" generally refers to the end that is further from the clinician and first enters the patient, forward and reverse rotations as referred to herein are not rotations in the colloquial sense, but rotations in two opposite directions.

Referring to fig. 1 to 6, an embodiment of the present invention provides an anti-drop guide catheter device, including a sheath 1 and a catheter 2 inserted into the sheath 1, wherein an inner wall of the sheath 1 is provided with a limiting groove 3, the limiting groove 3 is rotatably connected with a limiting ring 4, the limiting ring 4 is provided with a limiting wire 5, one end of the limiting wire 5 is disposed on the sheath 1, the circumferential length of the limiting wire 5 covering the limiting ring 4 after being unfolded is between one-half circumference and two-thirds circumference, and the limiting ring 4 is used for being elastically sleeved on the catheter 2.

Specifically, as shown in fig. 1, a distal end (i.e., an end entering a human body) of the sheath tube 1 is configured to be placed in an artery, an internal passage of the catheter 2 entering an artery vessel is formed inside the sheath tube 1, a limiting groove 3 is formed on an inner wall of a proximal end (i.e., an end far away from a patient) of the sheath tube 1, the limiting groove 3 is an annular groove, a limiting ring 4 is rotatably connected in the limiting groove 3, a radial dimension of the limiting ring 4 is configured to be elastically sleeved on the catheter 2, i.e., an inner wall of the limiting ring 4 is made of an elastic material and a radial dimension of the inner wall is smaller than a radial dimension of an outer wall of the catheter 2, i.e., the catheter 2 receives a certain frictional resistance to provide a hand feeling of a doctor when rotating or advancing and retreating, so that the limiting ring 4 can also rotate in the same direction when the catheter 2 is rotated by the doctor, a limiting wire 5 is disposed on the limiting ring 4, one end of the limiting wire 5 is fixedly connected to the limiting ring 4, the other end of the spacing wire 5 is fixedly connected on the groove wall of the spacing groove 3, the spacing wire 5 has two states, one is a contraction state, the other is a tight state, when the spacing wire 5 is in the contraction state, the spacing ring 4 can rotate freely without being influenced by the spacing wire 5, and when the spacing wire 5 is in the tight state, the two ends of the spacing wire are respectively pulled by the spacing ring 4 and the groove wall of the spacing groove 3, so that the spacing ring 4 can not continuously pull the spacing wire 5 to rotate towards the extending direction of the spacing wire 5, but only can rotate towards the direction which enables the spacing wire 5 to return to the contraction state, when the spacing ring 4 rotates, the spacing wire 5 can be driven to expand, the maximum circumferential length of the spacing ring 4 is between one half of the circumference and two thirds of the circumference, when the catheter 2 enters or exits the blood vessel in the human body, the catheter must enter or exit in the rotation, for example, the doctor can rotate the catheter 2 forwards by 120 degrees, so as to drive the limiting ring 4 to rotate by 120 degrees, at the moment, the limiting wire 5 can also expand one third of the circumference, the doctor rotates the catheter 2 backwards by 60 degrees, the limiting ring 4 also rotates backwards by 60 degrees, the limiting wire 5 can contract one sixth of the circumference, at the moment, the limiting wire 5 expands one sixth of the circumference in total, if the operation is repeated, the limiting wire 5 expands one third of the circumference in total, in the actual operation, the doctor does not have too large difference between the forward rotation angle and the reverse rotation angle through training, because the catheter 2 is long and the probability that the forward rotation angle and the reverse rotation angle are the same when the doctor rotates the catheter 2 is very low, the accumulation of angles always occurs, the accumulation of angles can be reflected on the expansion length of the limiting wire 5, when the expansion length of the limiting wire 5 is accumulated to two thirds of the circumference, the limiting wire 5 can limit the limiting ring 4, so that the limiting ring 4 cannot rotate, at the catheter 2 can not be limited again at the moment, and can only be rotated by a large angle firstly and then rotated again, and the catheter 2 can be fed into or withdrawn from the inside of the human body in the process of the forward rotation.

According to the anti-falling guide catheter device provided by the embodiment of the invention, when the catheter 2 moves in and out of the sheath catheter 1, and a doctor rotates the catheter 2 with the left hand, the limiting ring 4 is elastically sleeved on the catheter 2, so that the catheter 2 cannot be subjected to resistance when rotating or moving in and out, but the catheter 2 can drive the limiting ring 4 to rotate when rotating, at the moment, the circumferential length of the limiting wire 5 on the limiting ring 4 can be gradually increased to two thirds of circumference, the rotating angles of the catheter 2 which are not the same in forward rotation and reverse rotation can be accumulated, when the accumulated rotating angle reaches 240 degrees, the catheter 2 can be limited by the limiting wire, the doctor can not rotate the catheter 2, at the moment, the doctor can rotate the catheter 2 in a larger angle in a reverse rotation manner, and the catheter 2 can be prevented from being damaged due to overlarge rotating amplitude.

In an embodiment of the present invention, as shown in fig. 3, a bending portion 11 is disposed at a distal end (i.e. an end entering a human body) of the catheter 2, the bending portion 11 is made of an elastic material, the bending portion 11 is curved in a natural state, the bending portion is a smooth curve shape adhering to an outer shape of a guide wire when being extended and limited by the guide wire, that is, an elastic coefficient of the bending portion is smaller than an elastic coefficient of the guide wire, and a plurality of circular holes (not shown in the figure) are further disposed on the bending portion 11, in a prior art, in general, the guide wire is fed into an internal blood vessel channel of the human body through a sheath tube 1 to a coronary artery opening of the heart, the catheter 2 is fed into the coronary artery opening of the heart through a guide wire guide direction, and then the guide wire is withdrawn, the blood vessel in the heart is tortuous and thin, a distal end of the catheter 2 may cause sudden perforation of the blood vessel, the great difficulty is caused to the operation, because the bending part 11 is arranged at the far end of the catheter 2, when the guide wire is withdrawn, the far end of the catheter 2 is bent into a natural state by the self due to the withdrawal of the guide wire, so that the damage to the blood vessel wall can be reduced, the arrangement has the effect that the catheter 2 can be arranged in a smaller size and the size is larger based on the patient, the reason is that, for example, compared with a 4F catheter and a 5F catheter, in the selection of the catheter 2, the 4F catheter 2 has the advantage that the small-diameter catheter 2 has small damage to the blood vessel, particularly in the radial artery, which may be beneficial to reducing the circumflex and damage, in addition, the incarceration is reduced for some coronary arteries with pathological changes, which may be more suitable, but has the defect that the same area does not reach the same dosage of the 5F catheter 2 at the same time, because the area needing the radiography is smaller, in the region, the opening of the linear catheter 2 is limited, the 4F catheter 2 outputs a smaller amount of contrast medium compared with the 5F catheter 2, and a satisfactory contrast effect may be difficult to achieve in some people, in the present embodiment, a catheter with a bendable end portion is provided, so that a plurality of circular holes are provided in the bending portion 11, the contrast medium can be injected into the coronary artery through the circular holes, in the same region, the bending portion 11 has more contrast medium output ports, so as to provide the same or similar contrast medium amount as that of the 5F catheter 2, and the contrast medium is output instantly, and the bending portion 11 will swing and deform in the process of outputting, so that the form inside the coronary artery can be displayed in a larger range, and the deformation and swing of the bending portion 11 itself also provides a clearer reference object for a doctor, so that a large amount of contrast medium can be injected when the 4F catheter 2 is selected, and the contrast medium enters the coronary artery through the plurality of circular holes.

In another embodiment of the present invention, as shown in fig. 4 and 5, the limiting ring 4 includes an inner ring 6 and an outer ring 7, the outer ring 7 is sleeved in the limiting groove 3, the outer ring 7 is elastically sleeved on the inner ring 6, the inner ring 6 is elastically sleeved on the catheter 2, the inner ring 6 has an axial extension part through which it extends to the outside of the sheath tube 1, the inner wall of the outer ring 7 is circumferentially provided with a plurality of protruding ribs 8, preferably, the outer ring 7 is circumferentially provided with four protruding ribs 8, and the protruding ribs 8 are approximately triangular, and the approximately triangular shape includes an inclined surface, a circumferential surface and a radial surface, the circumferential surface is the inner wall of the outer ring, the inclined surface of the protruding ribs 8 is provided with a plurality of annular grooves 9 and the protruding ribs 8 have elasticity, preferably, one protruding rib 8 is provided with three annular grooves 9, the inner ring 6 is provided with protruding portions 10 made of soft elastic material, the protruding portions 10 correspond to the protruding ribs 8 one another, and the protruding portions 10 are limited in the annular grooves 9, the protruding portions 10 have obvious seizing feeling when they completely enter the annular grooves 9, so that an operator knows that the inner ring 6 has different radial inner diameter of the inner ring 6 and the inner ring 6, when the inner ring 6 rotates, the inner ring 6 and the inner ring 2 rotates, the inner ring 6 and the inner ring 2 have different diameters, the groove wall of the annular groove 3 is made of elastic materials, namely when a doctor needs to adjust, the doctor squeezes the groove wall of the annular groove 3 with one hand to enable the groove wall to be tightly attached to the outer ring 7 so as to limit the outer ring 7, then only needs to rotate the extending part of the inner ring 6 extending out of the sheath tube 1 with the other hand, and the inner ring 6 rotates to enable the protruding part 10 on the inner ring to pass through each annular groove so as to adjust the inner diameter of the inner ring, so that catheters with different radial sizes, such as catheters with 3F-5F, are adapted.

Further, the extending direction of the annular groove 9 is the axial direction of the catheter and the sheath 1, but the protrusion 10 is a half-cone structure, the radial dimension of the half-cone structure, that is, the protrusion 10, gradually decreases from one end to the other end along the axial direction, the axial dimension of the half-cone structure is more than three times of the axial dimension of the annular groove 9, and at an initial position, the half-cone structure is inserted into the annular groove 9 through the middle part thereof, so that the axial pulling of the inner ring 6 makes the part of the inner ring, which is matched with the annular groove 9, larger or smaller, so that for each catheter, the radial dimension of the inner ring 6 can be finely adjusted by pulling the inner ring axially, that is, the magnitude of the friction between the inner ring 6 and the catheter can be adjusted, so that a doctor can adjust the drawing resistance of the catheter relative to the inner ring 6 within a certain range.

While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.

Claims (8)

1. An anti-drop guide catheter device comprises a sheath catheter and a catheter penetrating through the sheath catheter, and is characterized in that a limiting groove is formed in the inner wall of the sheath catheter, a limiting ring is connected in the limiting groove in a rotating mode, a limiting wire is arranged on the limiting ring, one end of the limiting wire is fixedly connected to the groove wall of the limiting groove, the circumferential length of the limiting wire covering the limiting ring after being unfolded ranges from one half circumference to two thirds circumference, and the limiting ring is elastically sleeved on the catheter; the limiting ring rotates to drive the limiting wire to be in a contracted state to a tightened state;

the inner wall of spacing ring is elastic material and the radial dimension of inner wall is less than the radial dimension of pipe outer wall, can receive certain frictional resistance when pipe rotation or advance and retreat promptly, spacing ring syntropy rotates when rotatory pipe, the other end rigid coupling of spacing silk is on the spacing ring, spacing silk has two states, firstly the shrink state, secondly the state of tightening, when spacing silk is in the shrink state, the spacing ring can rotate wantonly, it does not receive the influence of spacing silk, when spacing silk is in the state of tightening, its both ends are held by the cell wall of spacing ring, spacing groove respectively.

2. The dropout prevention guide catheter device according to claim 1, wherein a distal end of the catheter is provided with a bent portion on which a plurality of circular holes are provided.

3. The anti-drop guide pipe device according to claim 1, wherein the limiting ring comprises an inner ring and an outer ring, the outer ring is elastically sleeved on the inner ring, the inner ring is elastically sleeved on the proximal end of the guide pipe, the inner ring extends out of the sheath pipe, a plurality of protruding ribs are circumferentially arranged on the outer ring, a plurality of annular grooves are arranged on the protruding ribs, the intervals between the plurality of annular grooves are equal, protruding portions are arranged on the inner ring, and the protruding portions and the annular grooves are in one-to-one correspondence.

4. A dropout prevention guide catheter device according to claim 3, wherein the proximal rotation of the inner ring rotates the catheter.

5. The fall prevention guide tube device according to claim 4, wherein the rotation of the guide tube rotates the protrusions on the inner ring, and the protrusions pass through the annular groove one by one.

6. The fall prevention guide tube device according to claim 3, wherein four annular grooves are provided on the projection rib.

7. The dropout prevention guide catheter device of claim 5 wherein the proximal rotation of said inner ring rotates said catheter and the rotation of said catheter rotates said inner ring in two opposite directions.

8. The anti-drop guide catheter device according to claim 2, wherein the profile of the catheter after being threaded into the guide wire is attached to the profile of the guide wire.

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